lg_perlin_noise.c File Reference

Functions
fnl_state	fnlCreateState ()
float	fnlGetNoise2D (fnl_state *state, FNLfloat x, FNLfloat y)
float	fnlGetNoise3D (fnl_state *state, FNLfloat x, FNLfloat y, FNLfloat z)
void	fnlDomainWarp2D (fnl_state *state, FNLfloat *x, FNLfloat *y)
void	fnlDomainWarp3D (fnl_state *state, FNLfloat *x, FNLfloat *y, FNLfloat *z)

Detailed Description

=== Perlin noise funcs ===

• Range = [-sqrt(n / 4), sqrt(n / 4)] with n = dim
• n = 2 -> [-0.7, 0.7]
• Often and typically normalized to [-1.0, 1.0] in implementations

Now using FastNoiseLite lib by Jordan Peck - seems pretty good

NOTE: FOLLOWING CODE IS COPYRIGHT(C) 2023 JORDAN PECK

=== Fast Noise Lite ===

• Copyright(c) 2023 Jordan Peck (jorda.nosp@m.n.me.nosp@m.2@gma.nosp@m.il.c.nosp@m.om)
• Copyright(c) 2023 Contributors
• MIT License

Function Documentation

fnlCreateState()

fnl_state fnlCreateState

(

)

Creates a noise state with default values.

Parameters

seed	Optionally set the state seed.

fnlGetNoise2D()

float fnlGetNoise2D	(	fnl_state *	state,
		FNLfloat	x,
		FNLfloat	y
	)

2D noise at given position using the state settings

Returns

Noise output bounded between -1 and 1.

fnlGetNoise3D()

float fnlGetNoise3D	(	fnl_state *	state,
		FNLfloat	x,
		FNLfloat	y,
		FNLfloat	z
	)

3D noise at given position using the state settings

Returns

Noise output bounded between -1 and 1.

fnlDomainWarp2D()

void fnlDomainWarp2D	(	fnl_state *	state,
		FNLfloat *	x,
		FNLfloat *	y
	)

2D warps the input position using current domain warp settings.

Example usage with fnlGetNoise2D:

fnlDomainWarp2D(&state, &x, &y);
noise = fnlGetNoise2D(&state, x, y);

fnlDomainWarp3D()

void fnlDomainWarp3D	(	fnl_state *	state,
		FNLfloat *	x,
		FNLfloat *	y,
		FNLfloat *	z
	)

3D warps the input position using current domain warp settings.

Example usage with fnlGetNoise3D:

fnlDomainWarp3D(&state, &x, &y, &z);
noise = fnlGetNoise3D(&state, x, y, z);